ZEISS On Your Campus Online is a series of online webinars that will provide the opportunity to connect live with your local ZEISS microscopy specialists and regional experts every Monday at 2.00 pm AEST. Webinar topics will range from basic microscope operation through to specific data analysis techniques or showcases of the latest microscopy technologies, and all are designed to improve microscopy workflows, yield higher quality data, and speed up time to results.
We welcome you to join us in the upcoming webinars:
Rapid and Large-Scale Sample Preparation for EBSD using the ZEISS LaserFIB (21 September)
Fluorescence Microscopy (28 September)
Grain Morphology and Hosting Characteristics as Determining Factors in Micron to Sub-micron Gold Recoverability (5 October)
Fluorescence microscopy has been a critical tool in answering complex biological questions since its invention over 100 years ago. Modern fluorescence techniques and instrumentation continue to evolve enabling increasing advances in sensitivity, resolution and speed allowing us to peer deeply into the dynamic processes of living cells and whole organisms. In this webinar, we will discuss the basics of fluorescence microscopy and give some useful guides into sample preparation, fluorescence labelling and state of the art fluorescence imaging techniques used by todays life science researchers
Faster, more sensitive EBSD cameras and high beam current scanning electron microscopes (SEM) mean that sample preparation has replaced acquisition time as the rate limiting step that hinders analytical EBSD throughput of solid state samples. Join us in this webinar to see how modern sample preparation techniques will shift this paradigm back again.
Core to this webinar will be a demonstration of workflows where samples are ablated polished using a FIB-SEM combined with a femtosecond laser system. The femtosecond laser facilitates extremely fast material ablation and, together with the high-resolution imaging and post-polishing capabilities of the FIB-SEM, enables rapid and precise relocation and preparation of specific regions of interest for EBSD analysis.
We will show how ablated metal surfaces are ideally suited for EBSD grain mapping (FIB post-polishing can be readily applied in-situ but it is often unnecessary because the surface quality after femtosecond ablation is commonly ideally suited for subsequent EBSD experiments) and demonstrate how a 300 x 200 µm large EBSD-suitable region of interest can be prepared in as little as 5 minutes.
Cumulative assays of head and tail do not always equal recovered gold. This may be due to mineralogical factors, such as the presence of refractory gold, grain size and shape, host associations, liberation, or due to issues with the metallurgical process. Modern microscopy techniques can afford exacting quantification of gold presence as well as a description of its environment and 3D morphology. The dispersion of non-liberated, sub-micron (down to a few nanometers) gold phases within a host or hosts can now be measured, as can the effects of grain morphology on recoverability in a circuit.
In this webinar we will present advances in scanning electron microscope (SEM)-based automated quantitative mineralogy (AQM) analysis of gold ores that quantifiably and consistently account for the presence of nanometer-sized gold grains. We will also elaborate on the application of 3D X-ray microscope (XRM) techniques that offer several advantages over 2D techniques when analyzing the cause of gold losses to tailings. The use of XRM removes the need to analyze a multitude of samples in 2D to adequately interpret a 3D environment, and reduces the number of samples needed for the detection of phases present in trace proportions (i.e., low grade gold).